Asphalt and conveyor belt: what they have in common

1. Step 1. Asphalt — is material for — Airport. Or asphalt.
2. Step 2. Airport — has part — Jet bridge. Jet bridges.
3. Step 3. Jet bridge — has part — Hydraulic cylinder. Raising the bridge.
4. Step 4. Hydraulic cylinder — is part of — Tunnel boring machine. Hydraulic cylinders push the machine forward.
5. Step 5. Tunnel boring machine — has part — Conveyor belt. Spoil is removed by a conveyor.

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